As Politico reports, "the Texas congressman confirmed his plans Monday night on Fox News, after news reports of his plans for a late-afternoon announcement in Des Moines had circulated online hours earlier. A Paul source told Politico that he'll also roll out his campaign team for the first-in-the-nation caucus state Tuesday."

While on Fox News' Hannity, Paul and the show's host disagreed on Islam's threat to the United States. Politico says that Paul "dismissed Sean Hannity's fear that Sharia law is coming to the United States."

Paul was the 1988 Libertarian Party candidate for president. In 2008, he went after the GOP nomination. His son, Republican Rand Paul, was elected to the Senate from Kentucky last year.

Our friend Frank James follows the 2012 campaign news over at It's All Politics. Copyright 2011 National Public Radio. To see more, visit http://www.npr.org/.